interest expense increased $67.3 million, primarily reflecting increases in interest expense of $52.4 million on deposits, $13.4 million on total borrowings and $1.5 million on derivative cash collateral. The increased interest expense on deposits primarily reflects a 293-basis point increase in rates paid on money market accounts and a $323.8 million increase in average balances of such deposits, a 256-basis point increase in rates paid on savings accounts and an increase of $98.5 million in average balance of such deposits, and a 311-basis point increase in rates paid on CDs and an increase of $505.7 million in average balance of such deposits. The increases in interest expenses on money market accounts, saving accounts and CDs were primarily due to intense price competition among banks and other financial institutions and the rising interest rate environment. The increased interest expense on total borrowings primarily reflects a $1.08 billion increase in the average balance of FHLBNY advances and a 354-basis point increase in rates paid on such advances.
Provision for Credit Losses. We recorded a credit loss provision of $1.8 million during the three months ended September 30, 2023, compared to a credit loss provision of $6.6 million for the three months ended September 30, 2022. The $1.8 million credit loss provision for the three months ended September 30, 2023, was primarily associated with increased provisioning for individually analyzed loans. The $6.6 million credit loss provision for the three months ended September 30, 2022 was primarily due to changes in forecasted macroeconomic conditions.
Non-Interest Income. Non-interest income was $7.9 million during the three months ended September 30, 2023, compared to $9.4 million during the three months ended September 30, 2022. During the three months ended September 30, 2023, non-interest income decreased $1.4 million from the three months ended September 30, 2022, reflecting a decrease of $1.4 million from net gain on sale of securities and other assets, an increase of $299 thousand related to a loss on equity securities and a decrease of $183 thousand on title fees, partially offset by an increase of $234 thousand of loan level derivative income, an increase of $140 thousand in BOLI income and a $93 thousand increase in all other non-interest income during the 2023 period.
Non-Interest Expense. Non-interest expense was $59.5 million during the three months ended September 30, 2023, compared to $48.3 million during the three months ended September 30, 2022. During the three months ended September 30, 2023, non-interest expense increased $11.2 million from the three months ended September 30, 2022, primarily due to a $8.6 million increase in severance expense, a $1.3 million increase in salaries and employee benefits, a $1.1 million increase in federal deposit insurance premiums, a $875 thousand increase in data processing costs and a $548 thousand increase in marketing expenses, offset by decreases of $839 thousand in professional services, and $607 thousand in occupancy and equipment expense. The increase in severance expense was due to the Chief Executive Officer succession. The increase in federal deposit insurance premiums relates to an increase in deposit insurance rates due to a special assessment by the FDIC.
Non-interest expense was 1.73% and 1.54% of average assets during the three months ended September 30, 2023 and 2022, respectively.
Income Tax Expense. Income tax expense was $8.1 million during the three months ended September 30, 2023, compared to income tax expense of $15.4 million during the three months ended September 30, 2022. The reported effective tax rate for the three months ended September 30, 2023 was 35.1%, and 28.1% for the three months ended September 30, 2022.
Comparison of Operating Results for the Nine Months Ended September 30, 2023 and 2022
General. Net income was $79.8 million during the nine months ended September 30, 2023, compared to net income of $112.5 million for the nine months ended September 30, 2022. During the nine months ended September 30, 2023, net interest income decreased by $40.6 million, income tax expense decreased by $12.4 million, non-interest expense increased by $9.2 million, the provision for credit losses decreased by $6.0 million, and non-interest income decreased by $1.4 million, compared to the nine months ended September 30, 2022.
The discussion of net interest income for the nine months ended September 30, 2023 and 2022 should be read in conjunction with the following tables, which set forth certain information related to the consolidated statements of income for those periods, and which also present the average yield on assets and average cost of liabilities for the periods indicated. The average yields and costs were derived by dividing income or expense by the average balance of their related assets or liabilities during the periods represented. Average balances were derived from average daily balances. No tax-